Human Biology Final Exam

Front 1

Connects bone to bone

Back 1

Ligaments

Front 2

Excessive bone loss, Common to old age and especially in older women

Back 2

Osteoperosis

Front 3

Bones are covered by a tough layer of connective tissue called:

Back 3

Periosteum

Front 4

Cells that build bone tissue are called:

Back 4

Oseteoblasts

Front 5

A bundle of muscle fibers wrapped with connective tissue is called a(n):

Back 5

Fascicle

Front 6

The contractile unit of the myofibril

Back 6

Sarcomere

Front 7

The neuron and all of the muscle cells it sends signals to are known as a(n):

Back 7

Motor unit

Front 8

An infection of a deep wound caused by bacteria characterized by forceful and painful muscle contraction that ultimately resulting in death due to respiratory failure.

Back 8

Botulism

Front 9

Myosin is activated when calcium ions are released from the:

Back 9

Sarcoplasmic Reticulum

Front 10

An individual with one dominant and one recessive gene is said to be:

Back 10

Heterozygus

Front 11

Failure of the blood to clot correctly is a characteristic of the condition known as:

Back 11

Hemophilia

Front 12

The molecule in red blood cells responsible for carrying oxygen

Back 12

Hemoglobin

Front 13

Converts fibrinogen to fibrin

Back 13

Thrombin

Front 14

The tiniest blood vessels are known as:

Back 14

Cappilaries

Front 15

When cells in an early stage embryo start to divide they from a ball called the:

Back 15

Morula

Front 16

Cells are limited in the number of times they can divide because at each division the chromosomes lose DNA from:

Back 16

Telomeres

Front 17

A foreign protein that causes an individual to make antibodies

Back 17

Antigen

Front 18

The membrane that surrounds the heart is called the:

Back 18

Pericardium

Front 19

Muscles contract because of the interaction of two filaments known as myosin and:

Back 19

Actin

Front 20

Thrombin causes prothrombin to be changed to:

Back 20

Fibrin

Front 21

T cells begin life in the bone marrow but then migrate to mature in the:

Back 21

Thymus

Front 22

Abnormal brain proteins that are not folded correctly and can cause other proteins to be mis-folded:

Back 22

Prions

Front 23

Cells that actively secrete antibodies:

Back 23

Plasma

Front 24

Mast cells get an allergic reaction going by releasing:

Back 24

Histamine

Front 25

The thickest layer of cardiac muscle

Back 25

Myocardium