The human body is made up of approximately how many specialized cell types?
a. 400
b. 200
c. 100
d. 50
e. 25
b
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Carla was startled by an extremely loud bang that sounded like a gunshot. Her heartbeat accelerated rapidly. When she found that the noise was only a car backfiring, she felt greatly relieved but her heart kept beating heavily for over half an hour
Why did this happen? What will be an ideal response
Muscle fibers can have various arrangements. The most powerful arrangement is called
A) parallel. B) convergent. C) circular. D) pennate. E) None of the answers are correct.
Which glial cell helps to form the blood-brain barrier?
A. Neurolemmocyte B. Microglial cell C. Ependymal cell D. Astrocyte E. Oligodendrocyte
The inherent pacemaker discharge rate of the sinoatrial node is 72 beats per minute.
Answer the following statement true (T) or false (F)