What does the bicep flex at the elbow?: Forearm What fluid is serving as a shock absorber for central nervous system?: Cerebrospinal fluid The heart is located in which cavity?: Pericardial Mitochondria, lysosomes, ribosomes are examples of?: Organelles What regulates light entering the pupil?: Iris What layer of the skin contains spiny-shaped cells?: Stratum Spinosum Which direction do abductor muscles move an extremity?: Away What is the spinal cord a continuation of?: Medulla oblongata What system brings oxygen to and eliminates carbon dioxide from blood?: Respiratory ‘ Transcription occurs in which organelle?: Nucleus By late 70’s, what percent of muscle mass has disappeared?: 50% Eccrine glands are the most common type of what?: Sweat gland What is an individual bundle of muscle cells called?: Fascicle Which division of the autonomic nervous system prepares the body from stress?: Sympathetic Stomach and bladder are in which cavity?: Abdominopelvic Smallest living units of biological organization?: Cells Has a cuticle, cortex, and medulla?: Hair What is the oily substance excreted onto the skin?: Sebum What kind of muscles are found inside the digestive tract, blood vessels, and uterus?: Smooth First contraction in labor is an example of what process?: Positive feedback Which type of muscle is found only in the heart?: Cardiac Chondrocytes are found in what cavities?: Lacunae Neurotransmitter at the neuromuscular junction?: Acetylcholine What is the stratum germinativum?: Regenerative layer of the skin Lactic acid builds up in muscles when this molecule is converted in the absence of oxygen?: Pyruvic acid Which part of the autonomic nervous system operates under non stressful conditions?: Parasympathetic What converts food into simpler substances for absorption?: Digestive system What restores resting membrane potential?: Repolarization Brain is located in which cavity?: Cranial The loss of what makes the elderly more sensitive to the cold?: Circulation Phosphocreatine provides cells with what energy producing molecules?: ATP Brain decreases in size and mass due to loss of what?: Neurons How many nuclei does heart muscle contain?: Uninucleated Which glands are ductless and secrete hormones?: Endocrine Process correcting change to bring body back to normal?: Negative feedback

Melanocytes

Cells responsible for producing skin color.

Bicep Function

The bicep flexes at the elbow to move the forearm.

Cerebrospinal fluid

The fluid serving as a shock absorber for the central nervous system.

Pericardial cavity

The cavity where the heart is located.

Organelles

Mitochondria, lysosomes, and ribosomes are examples of organelles.

Iris

The part of the eye that regulates light entering the pupil.

Stratum Spinosum

The layer of the skin that contains spiny-shaped cells.

Abductor muscles

These muscles move an extremity away from the body.

Medulla oblongata

The spinal cord is a continuation of this structure.

Respiratory system

The system that brings oxygen to and eliminates carbon dioxide from the blood.

Nucleus

The organelle where transcription occurs.

50%

By the late 70's, this is the percent of muscle mass that has disappeared.

Eccrine glands

The most common type of sweat gland.

Fascicle

An individual bundle of muscle cells.

Sympathetic division

This division of the autonomic nervous system prepares the body for stress.

Abdominopelvic cavity

The stomach and bladder are located in this cavity.

Cells

The smallest living units of biological organization.

Hair structure

Hair has a cuticle, cortex, and medulla.

Sebum

The oily substance secreted onto the skin.

Smooth muscles

Muscles found inside the digestive tract, blood vessels, and uterus.

Positive feedback

The first contraction in labor is an example of this process.

Cardiac muscle

This type of muscle is found only in the heart.

Lacunae

The cavities where chondrocytes are found.

Acetylcholine

The neurotransmitter at the neuromuscular junction.

Stratum germinativum

The regenerative layer of the skin.

Pyruvic acid

Lactic acid builds up in muscles when this molecule is converted in the absence of oxygen.

Parasympathetic division

This part of the autonomic nervous system operates under non-stressful conditions.

Digestive system

The system that converts food into simpler substances for absorption.

Repolarization

The process that restores resting membrane potential.

Cranial cavity

The brain is located in this cavity.

Circulation

The loss of this makes the elderly more sensitive to the cold.

ATP

Phosphocreatine provides cells with this energy producing molecule.

Neurons

The brain decreases in size and mass due to the loss of these cells.

Uninucleated

Heart muscle cells contain this number of nuclei.

Endocrine glands

Glands that are ductless and secrete hormones.

Negative feedback

The process correcting changes to bring the body back to normal.