Chapter 13

The eutheria are (a) flying birds (c) female kangaroos (b) infertile frogs (d) placental mammals

If a statement is true, write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. Due to stereoscopic vision, primates can see in two dimensions.

A prehensile tail is adapted for (a) swimming (c) gliding (b) grasping (d) balancing

Convolutions are best associated with the (a) pharynx (c) brain (b) lung (d) nerve cord

The number of bones in the mature human skeleton is (a) 206 (c) 290 (b) 270 (d) 305

The major function of the backbone is to (a) protect the spinal cord (c) hold the neck and head (b) bend the trunk (d) support the legs

The strongest bone in the body is the (a) clavicle (c) femur (b) sternum (d) metatarsal

A true statement about bone is (a) The matrix is composed of living material. (b) Yellow marrow is in the spongy areas of the long bones. (c) Bone has a variety of living cells. (d) The ends of long bones are made of solid bone.

Bone is covered by a membrane known as the (a) peritoneum (c) perithecium (b) pericardium (d) periosteum

Three names for voluntary muscle are (a) striped, cardiac, smooth (c) skeletal, cardiac, striated (b) striated, skeletal, smooth (d) striated, striped, skeletal

A syncytium is (a) a group of cells without plasma membrane boundaries (b) a segment of smooth muscle that rings the trachea (c) a group of nerve cells that stimulates muscle (d) a single muscle fíber when stimulated by a neuron

A true statement about Purkinje fibers is (a) They are found in smooth muscle. (b) They lack contractile proteins. (c) They form a syncytium with skeletal muscle. (d) They cannot conduct electrical impulses.

Impulses enter nerve cells by way of the (a) dendrites (c) axons (b) cytons (d) terminal branches

Myelin is a nerve cell covering composed of (a) \(\mathrm{CaCO}_3\) (c) fat (b) collagen (d) carbohydrate

The fact that a nerve cell transmits an impuise totally or not at all is a type of response known as (a) "take it or leave it" (c) "make it and take it" (b) "all or none" (d) "all or some"

The part of the brain that is necessary for life is the (a) cercbrum (c) fissure of Rolando (b) cerebellum (d) medulla oblongata

The sympathetic and parasympathetic systems function (a) antagonistically to each other (b) to reinforce the activities of each other (c) without relationship to the autonomic system (d) to counteract the control of the cerebrum

The hypothalamus is a part of the brain where (a) integration of sensory information occurs (b) integration of memory and higher thought processes occur (c) follicle-stimulating hormone is released into the bloodstream (d) the nervous and hormonal systems interact

Blood in the pulmonary artery (a) lacks oxygen (c) contains nitrogen (b) lacks carbon dioxide (d) contains all three gases

The most important function of erythrocytes is to (a) carry nutrients from cell to cell (b) protect the body against disease (c) carry oxygen to all cells (d) remove carbon from all cells

The lymph nodes are glands that (a) secrete hormones and neurohumors (b) propel tissue fluids through the body (c) control the production of red blood cells (d) filter bacteria from the tissue fluids

Breathing is controlled by the (a) diaphragm (b) respiratory centers in the brain (c) level of carbon dioxide in the blood (d) all three of the above

The lungs are enclosed in a set of double membranes known as the (a) pericardium (c) pleural sac (b) periosteum (d) peritoneum

In humans the organs of excretion are the (a) kidneys, lungs, rectum (b) large intestine, sweat glands, lungs (c) kidneys, lungs, sweat glands (d) sweat glands, kidneys, anus

The function of the urinary bladder is to (a) store urine (c) add \(\mathrm{CO}_2\) to ammonia (b) detoxify urea (d) filter out glucose

Blood is transported to the kidney from the dorsal aorta by the (a) renal vein (c) arterioles (b) renal artery (d) glomerulus

The cup-shaped portion of the nephron is the (a) loop of Henle (c) Bowman's capsule (b) glomerulus (d) proximal convoluted tubule

The widest organ in the alimentary canal is the (a) stomach (c) colon (b) large intestine (d) gallbladder

Two glands lying outside the alimentary canal but important to digestion are the (a) liver and kidney (c) liver and pancreas (b) pancreas and thoracic duct (d) liver and colon

The major work of digestion occurs in the (a) stomach (c) large intestine (b) small intestine (d) esophagus

Digestion begins in the (a) stomach (c) esophagus (b) small intestine (d) mouth

In the human male, sperm is stored in the mass of tubules known as (a) sperm ducts (c) the vas deferens (b) Cowper's gland (d) the epididymis

Follicles are sites where (a) fertilization occurs (c) ova are produced (b) chromosomes are halved (d) sperm receive nutrients

The primary germ layer that gives rise to the blood vessels is the (a) endoderm (c) ectoderm (b) mesoderm (d) protoderm

The membranous sac of water that surrounds the developing human fetus is the (a) amnion (c) allantois (b) chorion (d) placenta

Identical twins are produced from (a) two eggs fertilized by two sperm (b) two eggs fertilized by one sperm (c) one egg fertilized by one sperm (d) one egg fertilized by two sperm

The implanted embryo is attached to the uterus by means of the (a) placenta (c) yolk stalk (b) umbilical cord (d) allantois