click below
click below
Normal Size Small Size show me how
SCI 220 Set 2
Weeks 6-12
Question | Answer |
---|---|
Skeletal muscles constitute approximately ____ of our body weight | 50% |
The prime mover can also be called the: | agonist |
The sternocleidomastoid muscle is an example of a muscle named for its: | point of attachments |
Groups of skeletal muscle fibers are bound together by a connective tissue envelope called the: | perimysium |
The part of the nervous system that transmits impulses from the CNS to the skeletal muscle is the: | somatic nervous system |
The largest and most numerous types of neuroglia are the: | astrocytes |
Along a neuron, the correct pathway for impulse conduction is: | dendrite, cell body, axon |
The spinal nerves are connected to the spinal cord and consist of _____ pairs. | 31 |
The brain has _____ major divisions. | six |
Pancreatic cell type that produces insulin. | beat cells |
Largest purely endocrine gland in the body. | thyroid gland |
_____ is used to determine the volume percentage of red blood cells in whole blood. | Hematocrit |
A graphic record of the heart’s electrical activity is a(n) | ECG |
The four structures that compose the conduction system of the heart are the | SA node, AV node, AV bundle, and Purkinje fibers |
The functions of the lymph nodes are | defense and hematopoiesis. |
The primary organ of the lymphatic system is the | thymus |
Adaptive immunity, part of the body’s third line of defense, is orchestrated by two different classes of a type of white blood cell called the | lymphocyte |
Because T cells attack pathogens more directly, T-cell immune mechanisms are classified as _____ immunity. | cell-mediated |
The presentation of an antigen by an antigen-presenting cell activates the T cell. | effector T cells and memory cells |