How are oxygen and nutrients supplied to the tissues of a muscle?
What will be an ideal response?
Each muscle has an extensive vascular supply that carries oxygen and nutrients. These blood vessels enter the muscle along with the nerves and follow the same branching pattern through the perimysium. Once within the endomysium, they form an extensive capillary network around each muscle fiber.
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Which layer of the epidermis consists of 25-30 layers of dead, flattened keratinocytes?
A) stratum corneum. B) stratum lucidum. C) stratum granulosum. D) stratum spinosum. E) stratum basale.
The metacarpophalangeal joints at the base of the fingers are ________ joints.
A. pivot B. hinge C. condylar D. plane (gliding) E. ball-and-socket
Which of the following is NOT an effect of aging on the immune system?
a) Increased susceptibility to infections b) Increased susceptibility to malignancies c) Decreased response to vaccines d) Increased response of T cells to antigens e) Decreased production of antibodies
This figure illustrates the microscopic anatomy of spongy bone. Which number indicates a central canal?
A. 1 B. 2 C. 4 D. 5 E. None of the choices is correct.