The human body consists of four tissue types.

Bone is an example of epithelial tissue.

Epithelial tissue is made up of cells that only line outer body surfaces.

Muscles attached to bones enable the body to move.

Neurons carry electrical messages

After tissues, organs are the next level or organization of the human body.

An organ is a structure that consists of only two types of tissues that work together to do the same job.

The digestive system breaks down food and absorbs its nutrients.

The endocrine system removes excess fluid from tissues and transports substances.

All of the organs and organ systems of the human body work together like a well-oiled machine.

The nervous system controls virtually all body activities.

Keeping a stable internal environment does not require constant adjustments.

A low concentration of carbon dioxide in the blood triggers faster breathing.

A low level of water in the blood triggers retention of water by the kidneys.

Approximately how many cells does the average person reaching adulthood have?

Cartilage is an example of which of the following tissues?

The lymphatic system removes which of the following from tissues?

All of the organs and organ systems of the human body work well together because they are closely regulated by which of the following systems?

Which of the following systems secretes hormones?

Which of the following systems produces gametes?

Insulin is secreted by an endocrine gland called the

Th correct order of levels of organization is

Which of the following statements is true concerning maintaining homeostasis?(1) Homeostasis is maintained through the interactions of a number of organ systems, (2) Not maintaining homeostasis can lead to death. (3) A high concentration of carbon dioxide in the blood triggers faster breathing to remove the oxygen. (4) A high level of water in the blood triggers retention of water by the kidneys.

Cartilage is a type of dense connective tissue.

One of the functions of the skeleton is to produce blood cells.

When blood levels of minerals are too high, bones release some of the minerals back into the blood.

The basic structure of bones is bone matrix.

There are three types of specialized cells in human bones.

Osteoclasts make new bone cells.

Bones are dynamic, living tissues.

Compact bones make up the dense outer layer of bone.

Periosteum is soft connective tissu.

Early in the development of a human fetus, the skeleton is entirely made up of bone.

A joint is a place where two or more bones of the skeleton meet.

There are four main types of joints.

Immovable joints are also known as synovial joints.

Of all the movable joints, a ball-and-socket joint has the greatest range of motion.

Despite their hardness and strength, bones can suffer from injury and disease.

How many bones does the human skeleton consist of?

Bone matrix consists of tough fibers made of

Osteoblasts secrete

Which of the following makes up the dense outer layer of bone?

Which of the following produces blood cells?

A person reaches skeletal maturity

The main difference between oesteoblasts and osteoclasts is that

The ribs and sternum are connected by

Muscles are organs composed mainly of muscle cells.

Each muscle fiber is a very short, thin cell.

There are four types of muscle tissues in the human body.

Both skeletal and cardiac muscles appear striated, or striped.

Contractions of smooth muscle are voluntary.

Skeletal muscle is the most common type of muscle in the human body.

Cardiac muscle contains a great many mitochondria.

There are well over 600 skeleton muscle fibers.

Each skeletal muscle consists of 125 skeletal muscle fibers.

Muscles can contract, actively extend, and lengthen

In exercises such as weightlifting, skeletal muscle contracts against a resisting force.

Continued exercise is necessary to maintain bigger, stronger muscles.

Each muscle fiber contains hundreds of organelles called myofibrils.

The region between two Z lines is called a sarcomere.

Voluntary contractions of cardiac and smooth muscles are also controlled by nerves.

Smooth muscle is found in the

Skeletal muscle fibers are wrapped in

Skeletal muscles need a rich blood supply to provide them with

The biceps and triceps muscles are located in the

Each myofibril is made up of how many types of protein filaments?

Actin filament are anchored to structures called

Muscles need a stimulus from which of the following to ‘tell’ them to contract

Two main proteins found in muscles are

The Skin is the major organ of the integumentary system

The average square inch of skin has 65 sweat glands

The Average square inch of skin has 60,000 pigment producing cells

The skin consists of two distinct layers

There are no nerve endings or blood vessels in the epidermis

Melanin is a yellow pigment

UV light decreases melanin output

The dermis is made made of tough connective tissues

Sebum increases the growth of microorganisms on the skin

The skin helps regulate body temperature

One common problem of the skin is acne

Acne is caused by a virus

Skin cancer is caused mainly by excessive exposure to UV light

People with lighter skin are at greater risk of developing skin cancer

skin cancers are generally symmetrical

The average square inch of skin has how many blood vessels?

Exposure to UV light stimulates the skin to produce which vitamin?

Melanin in the skin blocks

Acne affects approximately what percent of teens?

Skin cancers

The main component of hair is

Which of the following are functions of hair?

Which of the following are located in the dermis?

An action potential is necessary for nerve impulse to occur

Sensory neurons carry nerve impulses from the brain and spinal cord to muscles and glands

The Peripheral nervous system includes the brain and spinal cord

Myelin sheath is similar to the plastic that in cases an electrical cord

The somatic nervous system controls the reactions necessary to write true or false

The sensory division of the CNS includes the eyes, ears, mouth, nose, and skin

The spinal cord is the most complex organ of her human body and the control center of the nervous center

Taste buds on the tongue are actually found in the taste receptor cells

all Psychoactive drugs are illegal

Balance is due to an interaction between your hearing and vision receptors

Neurotransmitters are molecules that cross the synapse

The peripheral nervous system includes the sensory division and the motor division

The cerebrum is the largest part of the brain

The reason you can smell your food is because of the taste buds in your nose

Dendrites extend from the cell body and some nerve impulses to other neurons

Neurons transmit electrical signals called

The parts of a neuron include

What is an action potential?

The largest part of the human brain is the

Your somatic nervous system is responsible for

Alzheimer’s disease most likely occurs when

Your sense of balance is the responsibility of

The Peripheral nervous system consists

The central nervous system consists of

Steroid hormones can enter the nucleus and influence the expression of genes

Hormones are chemical messengers

Hey target so is the type of self as an effect on hormones

Non-steroid hormones going to the receptors in the cytoplasm of the cell

The pancreas is a large endocrine gland in the neck

Hypersecretion by and endocrine gland is often caused by a tumor

Most hormone feedback mechanisms involved positive feedback loops

Milk production by mother for her baby is positively regulated

Type two diabetes is generally treated by insulin injections

The thyroid gland is often called the master gland of the endocrine system

Secondary messengers affect cell processes inside the cell

Negative feedback controls insulin secretion by the adrenal gland

Negative feedback regulation occurs when a product feedback to decrease its own production

Endocrine hormones travel throughout the body in the blood

Glands in the endocrine system Include

Negative feedback regulation of hormones occurs

Which statement about thyroid hormones is true? 1. they increase the rate of metabolism in cells throughout the body 2. They control how quickly cells use energy 3. They are not steroid hormones 4. They are released by the parathyroid glands

Steroid hormones

Milk production

Thyrotropin-releasing hormone, or TRH,

The hormones released by the pancreas

To get glucose from blood digestion must occur

Chemical digestion is the physical breakdown of chunks of food into smaller pieces

The G.I. tract is one long tube that connects your mouth to your anus

The small intestine is part of the geo- track it’s about 23 feet long in adults

Mechanical digestion occurs mainly in the small intestine

Shell fish and chicken cause common food allergies

Your mouth is an organ of the digestive system

Absorption is the process in which nutrients plus in the bloodstream, where they can circulate throughout the body

Nutrients the body needs in relatively small amounts are called macro nutrients

The major salivary enzyme is Maltase, which aids in the digestion of carbohydrates

Minerals are chemical elements that are essential for life

Most nutrients are absorbed into the blood in the jejumun

Most chemical digestion takes place in the stomach

According to MyPyramid, chips and ice cream can be eaten every day

Most people can survive only a few days without carbohydrates