31) Acne caused by problems with the:
A) sweat glands.
B) endocrine : 1380921.
31) Acne is caused by problems with the:
A) sweat glands.
B) endocrine glands.
C) sebaceous glands.
D) hair follicles.
32) Keratinized cells near the surface of the epidermis are:
A) found in a single layer.
B) mostly dead and water resistant.
C) about one month old.
D) derived from nervous tissue.
33) The inner layer of the skin, the dermis, is mostly:
A) epithelial tissue.
B) muscle tissue.
C) connective tissue.
D) keratin.
E) nervous tissue.
34) A paper cut that draws blood must have cut down into at least which layer of the skin?
A) subcutaneous layer
B) dermis
C) adipose layer
D) epidermis
35) Hair color (or lack of it) is mostly due to:
A) activity of melanocytes.
B) a colored version of keratin.
C) sebaceous gland pigments.
D) sweat gland pigments.
36) Glands found primarily in the groin and armpit areas are the:
A) sebaceous glands.
B) merocrine sweat glands.
C) apocrine glands.
D) endocrine glands.
37) Structures of the skeletal system include all of the following except:
A) bone.
B) cartilage.
C) nails.
D) ligaments.
38) Which of the following typically connects a bone to another bone?
A) cartilage
B) ligaments
C) tendons
D) marrow
39) Which of the following is part of the axial skeleton?
A) thoracic cage bones such as the ribs
B) pelvic girdle bones such as the os coxa
C) arm bones such as the humerus
D) leg bones such as the femur
40) Which of the following best describes “spongy bone”?
A) soft bone tissue
B) very similar to compact bone but more flexible
C) bone tissue found only in the skull
D) contains blood-cell-producing red marrow
41) Blood vessels and nerves are found in which part of compact bone?
A) only in the marrow cavity
B) only on the outside surface
C) in central canals
D) in osteoblasts
42) The two main divisions of the skeletal system are:
A) cranial and axial.
B) appendicular and cranial.
C) axial and articular.
D) appendicular and axial.
E) vertebral and appendicular.
43) In a muscle cell, sarcomeres are the:
A) myofibrils that run the length of the cell.
B) fundamental units of muscle contraction.
C) thin filaments.
D) thick filaments.
44) The protein actin is found in the:
A) nucleus.
B) thick filaments.
C) thin filaments.
D) membrane.
45) Which part of the muscle cell actually does the work of contraction by attaching, pivoting, and pulling?
A) myosin heads
B) actin filaments
C) calcium ions
D) neurotransmitter molecules
31) Acne caused by problems with the:
A) sweat glands.
B) endocrine : 1380921
