Answer: The correct answer is option c.
Explanation:
Cardiac conduction system is formed by specialized cardiac muscle cells which enable the heart to contract in coordinated fashion.
The main component of this system are:
- Sinoatrial node
- Atrioventricular node
- Bundle of His
- Branched bundle
- Punkinje fibers
SA node consists of cells known as pacemaker cells. These cells spontaneously generate action potentials which lead to the contraction of atria.
These potentials are then passed to AV node which relay them to bundle of His. These bundles are branched into right and left bundle which ultimately transfer these potentials to Purkinje fibers.
The potentials from these fibers lead to the contraction of ventricles.
Answer: Competent cells are able to take up naked DNA, they occur naturally and can be created in the laboratory
Explanation: Competent cells are cells that can modify its genetic make up and take other DNA using transfomation. Competent cells are commonky made from e.coli because it can replicate faster, readily available for use. DNA is cleavedusing restriction enzymes making up sticky ends.
Answer: I had the same problem in one of my exams. I think the answer is "the ecosystems with greater diversity is more stable and would, therefore, be more likely to withstand the drought.
Explanation:
I chose this because it seems like the most logical explanation.
<u>Answer:</u>
The effectors of the autonomic nervous system pathway are listed below:
- Cardiac muscle
- Glands
- Smooth muscle
- Skeletal muscle
<u>Explanation:</u>
- Effectors in anatomy are the responders to stimuli which can be cells or organs.
- For example, the skeletal muscle is a effector because it receives the electrical signal form the brain.
- The brain sends the impulse through the spinal cord to the skeletal muscle to contract or expand, the skeletal muscle receives it and does according to the signal, and hence it is an effector.
