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Trava [24]
1 year ago
7

Helper t-lymphocytes secrete ________ to stimulate the proliferation of b-lymphocytes.

Biology
1 answer:
zysi [14]1 year ago
7 0
There are choices for this question namely:

<span>A) Antigens
<span>B) Antibodies
</span><span>C) Cytokines
</span><span>D) Agglutinins
</span><span>E) A<span>llergens

The correct answer is "cytokines". These helper T cells secrete cytokines that will stimulate the B cells into differentiating to plasma cells. These plasma cells will then produce antibodies to combat the offending agent depending on the antigen presented.</span></span></span>
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Which of the following represents the correct flow of air into the lung of a mammal?
7nadin3 [17]

I believe the answer would be A.

The flow is larynx, trachea, bronchi, bronchioles, alveoli

3 0
2 years ago
"the myelin sheath consists of a(n) ________."
stellarik [79]

The myelin sheath is consist of a cell called the glial cell. The glial cell is the one responsible for providing assistance in neurons as well as insulation of which will be in between of them. This type of cell is usually seen in the CNS and it has different types.

8 0
2 years ago
Four students were asked to classify the activities of the people in the picture below as examples of either potential or kineti
frez [133]

Hi there!

\large\boxed{\text{The first choice.}}

Kinetic Energy (1/2 · mass · velocity²) occurs when an object is in motion, or a force is occurring on the object. An example would be a car in motion.

Potential energy (mass · height · gravity ) is obtained when an object has the ability to do work. An example would be an object on a shelf. It has the potential to fall, and this would cause the potential energy to become converted into kinetic energy.

-----------------------------------------------------------------------------------------------------------

Looking at the examples in the table,  we can sort them as such:

Girl swimming laps- Kinetic energy because the girl is in motion.

Boy on diving board - Potential energy because the boy is not in motion, but has the potential to be in motion.

Girl hitting volleyball - Kinetic energy because the volleyball is in motion.

Boy holding volleyball- Potential energy because the volleyball is stationary and has the potential to be in motion.

Therefore, the correct table is table 1.

5 0
1 year ago
Can others, besides athletes, benefit from skill-related fitness? why?
prisoha [69]
<span>Yes, people besides athletes can benefit from skill-related fitness. Skill related fitness training can increase the coordination, reaction time, balance and agility of individuals at large, leading to an increased in ability to complete routine workplace tasks. Accident avoidance can be a benefit to cab drivers with increased reaction times. Wait staff can benefit from increased balance to skillfully carry large trays, Mechanics with good coordination are able to more quickly assemble complex components and in the even of a physical confrontation police officers can benefit from increased agility.</span>
7 0
2 years ago
In humans, Rh-positive individuals have the Rh antigen on their red blood cells, while Rh-negative individuals do not. If the Rh
Marta_Voda [28]

Answer:

D. 0.60

Explanation:

If the population is in Hardy-Weinberg equilibrium, the genotypic frequencies are:

  • freq AA = p²
  • freq Aa = 2pq
  • freq aa = q²

<em>p</em> is the frequency of the Rh positive allele (A) and <em>q</em> is the frequency of the Rh-negative allele (a).

If 84% of the population is Rh-positive, then 16% is Rh-negative and has the genotype <em>aa</em>. Therefore:

q² = 0.16

q = √0.16

q=0.4

And because p+q=1,

p = 1 - 0.4

p = 0.6

The frequency of the Rh-positive allele is 0.6

3 0
2 years ago
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