1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ymorist [56]
3 years ago
14

The adjustable opening in the center of the eye that helps control the amount of light entering the eye is called the __________

.
Biology
2 answers:
goldfiish [28.3K]3 years ago
6 0
Pupil is the answer, it changes according to the light it recives
andrew11 [14]3 years ago
5 0

Answer:

C. Pupil

Explanation:

You might be interested in
What idis the different between a species and a population?
brilliants [131]
A species is an integrated group of populations, integrated through their form, behavior, and preferred living conditions, the consequence of similar DNA and reproductive isolation from other species. A population is several organisms of the same kind in a particular area. 
3 0
3 years ago
Are those considered theories?
Gnesinka [82]

Answer: yes

Explanation: because  In common parlance, theory is often used to refer to something that is rather speculative.

<h2>HOPE THIS HELP</h2>

7 0
3 years ago
10 cuidados para no contaminar los ecociatemas
k0ka [10]
Soy inglés. Solo hablo un poco de español, disculpe si la traducción es mala

1) Utilice botellas de agua reutilizables
2) No pongas químicos peligrosos por el desagüe
3) Reciclar aceite de motor
4) Reciclar plasticos
5) Reducir las emisiones de automóviles
6) Iniciar una pila de compost
7) Educar a las personas
8) Camina, no conduzcas
9) Deja de fumar
10) Reducir la deforestación
6 0
3 years ago
The skeletal muscle-related symptoms of sarin gas poisoning are the result of
vesna_86 [32]

Explanation:

Gas poisoning in our environment is a major problem due to its high incidence. In the specific case of carbon monoxide poisoning, it is the leading cause of death due to involuntary poisoning in our environment, often coexisting with cyanide poisoning. Both poisonings can be serious, based on their diagnosis on the mere suspicion of the doctor. In addition, its importance lies in the fact that both poisonings have a specific treatment. Normo or hyperbaric oxygen therapy is the treatment of choice for carbon monoxide poisoning. In the case of cyanide poisoning, hydroxocobalamin is today the treatment of choice, as it has proven to be an effective antidote.

8 0
3 years ago
Match the function or location to the correct connective tissue. Allows the growth of long bones Intervertebral discs, pubic sym
pychu [463]

Answer:

<h3>Allows the growth of long bones</h3>

Hyaline cartilage

Hyaline cartilage allows growth of long bones by endochondral ossification, which involves <u>replacement of the initial hyaline cartilage models to bony tissue</u>. This <em>model</em> is <em><u>glass-like</u></em> and formed from the <u>combination of chondroitin sulfate and type II collagen</u>. Aside from bone growth, it's also seen in joints, anterior ends of ribs, upper respiratory tract like larynx, trachea, and bronchi.

<h3>Intervertebral disks, pubic symphysis</h3>

Fibrocartilage

Fibrocartilage is composed of<u> Type 1 and 2 collagen</u>, which contributes to the toughness of this tissue. It is present in these sites due to the dynamic nature of these body parts. This cartilage is able to w<u>ithstand a certain amount of shear and compressive forces</u>. Along with the hyaline cartilage, it also <u>promotes bone formation.</u>

<h3>External ear, epiglottis, and auditory tubes </h3>

Elastic cartilage

Elastic cartilage, or yellow cartilage contains a number of elastic fiber and collagen. Elastin is the primary protein in this tissue, which contributes to the <u>elasticity and flexibility</u> of the above body parts.  If observed under the microscope, its structure is same to hyaline but has numerous yellow elastic fibers present, which appear as a dark streak.

<h3>Outer portion of all bones</h3>

Compact bone

Compact bone or cortical bone, is the substance used to form the solid outside structure of the bones.

<h3>Inside skull bones, vertebrae, and sternum</h3>

Spongy bone

Cancellous bone, spongy bone, or trabecular bone is mostly found in the long bones, <u>covered by compact bone</u>. The bone is sponge-like in structure because it <u>houses the blood vessels inside the bones.</u>

<h3>Transports oxygen, carbon dioxide, and other substances</h3>

Blood

Blood is a connective tissue composed of red blood cells (erythrocytes), white blood cells (leukocytes), and platelets. It also connects bodily systems by t<u>ransporting nutrients, hormones, and chemical messengers, etc.</u>

<h3>Produces new blood cells and stores lipids</h3>

Bone marrow

Bone marrow is found <u>within the spongy bone</u> which houses the young blood cells until they are ready for use by the body or also called hematopoiesis.

<h3>Capable of strength with stretching and recoil in several directions</h3>

Dense irregular elastic connective tissue

For dense irregular elastic connective tissue, the elastic fibers are arranged randomly. This makes the organ <u>stretchable and</u> <u>flexible in all directions and able to return to its original shape</u>. An example of this is the dermis.

<h3>Tensile strength capable of withstanding stretch in all directions</h3>

Dense irregular collagenous connective tissue

Its fibers are also arranged in random but  with fibrous tissue. It is also <u>flexible and tougher</u> compared to dense irregular elastic connective tissue. It is usually found in <u>fibrous capsule of joints and muscle fascia.</u>

<h3>Vocal folds and ligaments between vertebrae</h3>

Dense regular elastic connective tissue

For dense regular elastic connective tissue, the elastic fibers are <u>arranged in parallel</u>. It enhances the present tensile strength to a specific direction wherein the fiber is oriented.

<h3>Tendons and ligaments</h3>

Dense regular collagenous connective tissue

For dense regular collagenous connective tissue, the collagen fibers are also arranged in parallel. Tensile strength and resistance is enhanced to a specific direction wherein the fiber is oriented. The role of these tissues is to <u>transfer forces to the bone to avoid injury.</u>

<h3>Provides superstructure for lymphatic tissues</h3>

Reticular tissue

Reticular tissue is found <u>mostly with numerous amounts of cells</u>. They are composed of <em>Type 3 collagen fibrils</em> and is <em>net-like</em> in appearance, also called <em>"reticulum" </em>due to the fiber arrangement (<em>reticulin</em>). They act as a <u>scaffold of the organ/s they cover.</u>

<h3>Energy storage</h3>

Adipose tissue

Adipose tissue is composed of fat cells or adipocytes. It also functions to <u>insulate and cushion</u> the body from hard surfaces.

<h3>Epithelial basement membrane sits on this</h3>

Loose connective tissue

Loose connective tissue or<u> areolar connective tissue</u>, contains a <u>lot of cells, ground matter, and spaces in between it</u>, coining the "loose" in its name. Fibroblasts, collagen fibers, and matrix, etc., are found in almost every part of the body. This helps in <u>keeping the organs in place and some slight tough protection. </u>

<h3>Precursor to adult connective tissues</h3>

Mesenchymal tissue

Mesenchymal tissue <u>forms the body’s connective tissues</u>, from bones, cartilage, to the organ systems. It is found <u>abundant in the development of fetal tissues.</u>

<h3>Umbilical cord of the newborn</h3>

Mucous connective tissue

Mucous connective tissue is also found <u>during development of the embryo</u>. Due to <u>mucoproteins</u>, it resembles a mucus-like substance, as in <u>Wharton's jelly found in the umbilical cord</u> and <u>vitreous in the eyeball.</u>

5 0
3 years ago
Other questions:
  • What is described by binary fission?
    10·1 answer
  • What is true in ecosystem
    14·2 answers
  • Which observation describes an increase in the interrelatedness of the global economy?
    7·2 answers
  • Which phrases are true of only the mantle? Check all that apply.
    14·2 answers
  • How are the outer planets similar?
    7·1 answer
  • Difference between onion cell &amp; spinach cell
    5·1 answer
  • How much photosynthesis occurs in the open ocean? What organisms complete this
    9·1 answer
  • 2. Of the fishes and marine reptiles, which are considered endothermic?
    10·1 answer
  • A child has a cat and calls all small furry animals cats is an example of
    6·2 answers
  • Translate this to an equation.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!