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
Ilya [14]
2 years ago
10

A cellular structure that is visible with an electron microscope but not with a light microscope is:____________.

Biology
1 answer:
emmasim [6.3K]2 years ago
6 0

Answer:

The ribosome will not be visible with a light microscope

You might be interested in
Which genetically modified organism will best prevent farmers from losing their crops during transport to grocery stores?
valkas [14]

Answer:

Probably oranges that have a prolonged shelf life

4 0
2 years ago
Several bodily responses are described below. For each response, determine what caused the change in
EastWind [94]

Answer:

  1. Body starts to sweat: The core body temperature exceeded the set range of 35 degrees to 41.5 degree celsius
  2. Breathing rate increases: Cells are not receiving adequate oxygen to produce adequate energy.
  3. Amount of saliva produced changes: Saliva is produced in response to pH changes in the mouth or the intake of food.
  4. Body starts to shiver: Core temperature dropped below the set range of 35 to 41.5 degree celsius.

Explanation:

Homeostasis:

Homeostasis is the physiological process of regulating the internal environment of the body against fluctuations in the external environment.

Homeostasis systems in the body follow the following basic scheme (from 1 to 4):

  1. Stimulus
  2. Sensor
  3. Control
  4. Effector

Various control centers in the body sense varying body conditions and in turn activate certain effector mechanisms to regulate the changing conditions.

Thermoregulation:

  • Thermoregulation is the control and regulation of the optimum core temperature of the body between the range 35 to 41.5 degree celsius.
  • The control center is the hypothalamus, a part of the brain that receives signals from receptors in the body and initiates the appropriate response.
  • If the core temperature exceeds the optimum range, two mechanisms are initiated:
  1. The blood vessels towards the skin and extremities dilate, increasing the blood flow, allowing heat loss to the environment.
  2. Sweat glands are activated, evaporation of sweat produces a cooling effect.
  • If the core temperature decreases, again, two mechanisms are activated:
  1. Blood vessels to the extremities constrict to prevent heat loss; those towards the core dilate to provide maximum heat to the internal organs.
  2. Shivering mechanisms (involuntary muscle contractions) are activated that generate heat.

Respiratory Homeostasis:

During exercise or strenuous physical activity, our cells need to produce a large amount of energy through cellular respiration. Since, cellular respiration requires oxygen, more and more oxygen needs to be supplied to the cells. A low oxygen signal detected by the hypothalamus (control center in the brain) increases the breathing rate to ensure that sufficient oxygen reaches the cells.

Oral homeostasis:

The salivary glands maintain the homeostasis of the oral cavity. Saliva is not produced in response to food but to maintain the pH of the oral cavity to protect the teeth and enamel. Saliva contains the enzyme amylase which digests carbohydrates in the mouth. Therefore, the production of saliva increases in response to smell, sight and taste of food.

8 0
3 years ago
Read 2 more answers
How would someone measure the effect of pH on the rate<br> ofenzyme reaction?
wlad13 [49]

Answer:

It can be determined by measuring product appearance or reagent disappearance also enzymatic activity (described below )

Explanation:

Effect of pH on enzymatic activity

PH effect: affects the state of dissociation of the groups, although all proteins are not affected in the same way because some do not have dissociable groups. Most enzymes have an optimal pH. If there are small changes in pH, the enzyme is not denatured. The pH can affect in two ways:

The substrate binding is better or worse than before.

That affects the catalytic speed of the reaction.

The enzymatic speed is measured in M ​​/ t and the enzymatic activity in mol / t, and the international unit μmol / min, amount of enzyme that transforms a micromol from substrate into product in one minute under optimal conditions. Another unit is the enzymatic amount that is required to transform 1 mol / s and is called katal.

4 0
3 years ago
What is the advantage of radial symmetry for sessile animals such as hydras and bilateral symmetry for mobile animals such as pl
Juliette [100K]

Answer:

- Radial symmetry is advantageous because sessile animals can "sit down", take food, or sense harmful environmental conditions from different directions.  

- Bilateral symmetry allows motile animals to move straight forward.

- The major evolutionary advantages of bilateral symmetry include cephalization, the formation of a head and tail area and a more directional motion.

Explanation:

Radial symmetry is advantageous for sessile organisms since it enables the uniform distribution of the sensory receptors around the body. In consequence, sessile organisms can react to environmental stimuli from every direction. On the other hand, bilateral symmetry allows motile organisms the arrangement of a specialized nervous system from the anterior end of the organism (i.e., the 'head'). Moreover, another important advantage of bilateral symmetry is the ability to equalize environmental pressures on both sides of the body, thereby enabling a rectilinear motion.

5 0
3 years ago
Which kind of organism is found at the end of a food chain?
ad-work [718]

Answer:

A decomposer is found at the end of a food chain.

3 0
2 years ago
Read 2 more answers
Other questions:
  • This food web of for a community in which all pine trees were recently cut down to make space for a shopping mall.
    15·2 answers
  • In the alpha helix, there is hydrogen bonding between the In the alpha helix, there is hydrogen bonding between the blank of one
    11·1 answer
  • Which gas found in the Earth's atmosphere greatly impacts the daily range of temperature on Earth. A) oxygen B) hydrogen C) nitr
    15·1 answer
  • Which statement is true about bacterial cells? *
    6·2 answers
  • carbon is removed from the atmosphere and put into food through photosynthesis respiration decomposition diffusion
    14·1 answer
  • What is the purpose of plants having mitochondria if they have chloroplasts?
    5·1 answer
  • At which time has the turtle population reached the carrying capacituy of the pond
    7·2 answers
  • A file cabinet with an original price of $50 is on sale for $35. by what percent did the price change?​
    7·1 answer
  • Which virus has a structure that includes an outer lipid bilayer that is studded with proteins?
    7·2 answers
  • Which occurs at a convergent boundary where one plate moves under another plate?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!