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
agasfer [191]
3 years ago
6

Explain TWO likely effects of a relatively small number of red blood cells on the body

Biology
1 answer:
OleMash [197]3 years ago
6 0

Answer:

Red blood cells (erythrocytes)

The red blood cells are highly specialized, well adapted for their primary function of transporting oxygen from the lungs to all of the body tissues. Red cells are approximately 7.8 μm (1 μm = 0.000039 inch) in diameter and have the form of biconcave disks, a shape that provides a large surface-to-volume ratio. When fresh blood is examined with the microscope, red cells appear to be yellow-green disks with pale centres containing no visible internal structures. When blood is centrifuged to cause the cells to settle, the volume of packed red cells (hematocrit value) ranges between 42 and 54 percent of total volume in men and between 37 and 47 percent in women; values are somewhat lower in children. Normal red blood cells are fairly uniform in volume, so that the hematocrit value is determined largely by the number of red cells per unit of blood. The normal red cell count ranges between four million and six million per cubic millimetre.

The red blood cell is enclosed in a thin membrane that is composed of chemically complex lipids, proteins, and carbohydrates in a highly organized structure. Extraordinary distortion of the red cell occurs in its passage through minute blood vessels, many of which have a diameter less than that of the red cell. When the deforming stress is removed, the cell springs back to its original shape. The red cell readily tolerates bending and folding, but, if appreciable stretching of the membrane occurs, the cell is damaged or destroyed. The membrane is freely permeable to water, oxygen, carbon dioxide, glucose, urea, and certain other substances, but it is impermeable to hemoglobin. Within the cell the major cation is potassium; in contrast, in plasma and extracellular fluids the major cation is sodium. A pumping mechanism, driven by enzymes within the red cell, maintains its sodium and potassium concentrations. Red cells are subject to osmotic effects. When they are suspended in very dilute (hypotonic) solutions of sodium chloride, red cells take in water, which causes them to increase in volume and to become more spheroid; in concentrated salt solutions they lose water and shrink.

When red cell membranes are damaged, hemoglobin and other dissolved contents may escape from the cells, leaving the membranous structures as “ghosts.” This process, called hemolysis, is produced not only by the osmotic effects of water but also by numerous other mechanisms. These include physical damage to red cells, as when blood is heated, is forced under great pressure through a small needle, or is subjected to freezing and thawing; chemical damage to red cells by agents such as bile salts, detergents, and certain snake venoms; and damage caused by immunologic reactions that may occur when antibodies attach to red cells in the presence of complement. When such destruction proceeds at a greater than normal rate, hemolytic anemia results.

Explanation:

You might be interested in
What is the full form of UV rays?​
Irina-Kira [14]

Answer:

UV radiation: Ultraviolet radiation. Invisible rays that are part of the energy that comes from the sun, can burn the skin, and cause skin cancer. UV radiation is made up of three types of rays -- ultraviolet A (UVA), ultraviolet B (UVB), and ultraviolet C (UVC).

Explanation:

6 0
2 years ago
Read 2 more answers
Imagine that beak color in a finch species is controlled by a single gene. you mate a finch homozygous for orange (pigmented) be
forsale [732]
Codominance or incomplete dominance is the answer in this question. This pattern of color expression is most likely to be an example of incomplete dominance or codominance. Codominance is defined as a form of dominance wherein the alleles of a gene pair in a heterozygote are fully expressed. Incomplete dominance on the other hand is a form of intermediate inheritance in which one of the allele for a specific trait is incompletely expressed over its paired allele.
4 0
3 years ago
WILL GIVE BRAINLIEST
REY [17]

Answer:

B

Explanation:

7 0
3 years ago
Read 2 more answers
In a dihybrid cross involving two autosomal traits on different chromosomes in which the parents are purebred for the opposite f
Simora [160]

Answer:

The question lacks options, the options are:

A) 1 out of 16

B) 3 out of 16

C) 6 out of 16

D) 9 out of 16

The answer is 1 out of 16

Explanation:

This is a DIHYBRID cross because it involves two different genes coding for distinct traits. One of the traits will be dominant while the other recessive. Hence, parents that are purebred for opposite forms of the trait means that one parent is homozygous dominant while the other is homozygous recessive. When these two parents cross, they produce F1 offsprings that all possess the dominant trait but heterozygous/hybrids.

When these hybrids are self-crossed, they produce four different combinations of gametes which when crossed using a punnet square will result in F2 offsprings with a 9:3:3:1 phenotypic ratio according to Mendel's observation.

9 represents offsprings that are dominant for both traits

The two 3's represents offsprings that are recessive for one trait and dominant for the other respectively.

1 represents offsprings that are homozygous recessive for both traits.

Hence, 1 out of 16 offsprings will be homozygous recessive for both traits.

4 0
3 years ago

 3. Compare the amount of energy that can be stored in ATP and glucose. How does the cell use each of these molecules to store
bogdanovich [222]
<span>3. Cells use glucose to store large amounts of energy for long period of time. 
In contrast, ATP is used to </span>store smaller amounts of energy that will be used in the next few seconds.<span>
A glucose molecule can store more than 90 times the energy of a ATP molecules.

4. The fact that the potted plant is in air tight jar affect the process of photosynthesis. The plant is airtight jar which means that the plant is not able to breath and run out of CO2 to produce sugars. So t</span><span>he plant wouldn't be able to complete photosynthesis.</span>
5 0
3 years ago
Other questions:
  • Blockage of the _____ can reduce blood supply to the brain, causing a stroke.
    14·1 answer
  • Help please AFSP HELP​
    11·2 answers
  • Josiah says this is a phylogenetic tree of the dinosaurs. maleek says it is a cladogram of the dinosaurs. who is correct?
    6·1 answer
  • O
    7·1 answer
  • Describe what causes convection currents, and how they result in the movement of tectonic plates. The best answer gets brainlies
    13·1 answer
  • What is the violent shaking of Earth's crust as built-up energy is released.
    8·1 answer
  • Which type of respiration is the most efficient in producing ATP?*
    11·2 answers
  • Please help I’m so sad :( I need to explaination please
    8·1 answer
  • Describe the characteristics and classification of seedless vascular and nonvascular plants
    6·1 answer
  • Which is the correct order in the scientific process?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!