Summarize what happens during the light reactions of photosynthesis.

How would you describe symmetry in invertebrates?

vodomira [7]

Answer:

Invertebrates can have bilateral or radial symmetry, or they can be asymmetrical. Bilateral symmetry means that the animal is arranged in the same way on both sides. Radial symmetry means the body parts are arranged in a circle around a central point.

4 0

2 years ago

The _____ sends out an electrical impulse that regulates the heartbeat.

olga nikolaevna [1]

Answer: The SA node

Answer choices are:

A. The AV node

B. The SA node

C. The purkinje fibers

D. The AV bundle

The SA node is the heart's natural pacemaker consisting of a cluster of cells located in the upper part of the wall of the right atrium. (the right upper chamber of the heart). The electrical impulses are produced and sent out from there to regulate heartbeat. This is also called the sinus code.

3 0

3 years ago

Read 2 more answers

A signal molecule in the interstitial fluid binds to a receptor on the cell membrane, triggering an intracellular cascade. Which

Lady bird [3.3K]

<h2>Function of The Cell Membrane</h2>

Explanation:

There are a few unique kinds of this simple development of particles. It could be as basic as atoms moving uninhibitedly, for example, assimilation or dispersion.
Proteins are utilized to help move atoms all the more rapidly. It is a procedure called encouraged dispersion.
It could be as straightforward as acquiring a glucose particle. Since the cell film won't permit glucose to cross by dispersion.
The cells are in a zone where there is a huge focus contrast. For instance, oxygen particle focuses could be exceptionally high outside of the cell and extremely low inside.
Those oxygen particles are little to such an extent that they can cross the lipid bilayer and enter the cell.
This is a water explicit procedure. For the most part, cells are in a domain where there is one convergence of particles outside and one inside.
Since focuses like to be the equivalent, the cell can siphon particles in an out to remain alive. Assimilation is the development of water over the layer

5 0

3 years ago

Which process that occurs during meiosis contributes to a germ cell having unique genetic material?

Gennadij [26K]

I do believe that it is C. crossing over :) I hope that is correct, it seems like the only plausible answer.

8 0

3 years ago

The selective serotonin uptake inhibitors, like the antidepressants Prozac, Zoloft, or Paxil, result in increased levels of sero

never [62]

Answer:

increase anxiety; decreased vulnerability to overreact to stress

Explanation:

Serotonin (5-HT) is a natural neurotransmitter that carries signals between nerve cells (neurons) throughout the body. This neurotransmitter (serotonin) is responsible for regulating many biological functions (e.g., mood, digestion, sleep, etc). Moreover, it has been shown that there is an association between low cerebrospinal fluid 5-hydroxyindole-acetic acid (5-HIAA, the principal serotonin metabolite in the brain) levels and the risk of developing depression or destructive behaviors. In addition, serotonin concentration can also be elevated in situations of anxiety and/or stress. Antidepressants such as Prozac, Zoloft and Paxil act as serotonin uptake inhibitors that increase serotonin concentration at the synaptic site. Like other drugs, these antidepressants may lead to increase anxiety and decrease the vulnerability to react to stress by downregulating sensitivity to serotonin released during natural stress situations.

3 0

2 years ago