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Biology Test 2/22 > Test practice > Flashcards

Test practice Flashcards

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1
Q

Endocrine system function?

A

regulates all biological processes in the body

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2
Q

Digestive system function?

A

Breaks down food into nutrients

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3
Q

Definition of feedback loops

A

a biological occurrence wherein the output of a system amplifies the system (positive feedback) or inhibits the system (negative feedback).

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4
Q

Respiratory system function?

A

Moves fresh air into body while removing waste gases

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5
Q

Integumentary system function?

A
  • Regulates body temperature
  • Cell fluid maintenance
  • Synthesis of vitamin D
  • Detection of stimuli
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6
Q

Immune system function?

A

Defends the body against infection while protecting the bodys own cells

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7
Q

Musculoskeletal function?

A

Supports you and helps you move

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8
Q

Reproductive system function?

A

Produce egg and sperm cells

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9
Q

Excretory system function?

A

Removes waste from body

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10
Q

Nervous system function?

A

transmits signals between the brain and the rest of the body

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11
Q

Circulatory system function?

A

delivers oxygen and nutrients to cells and takes away waste

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12
Q

Cell definition

A

smallest structural and functional unit of an organism

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13
Q

Tissue definition

A

a group or layer of cells that work together to perform a specific function

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14
Q

Organ definition

A

a part of the body that performs a specific function

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15
Q

Organ system definition

A

a group of organs that work together to perform a specific function

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16
Q

Definition of organism

A

a living thing

17
Q

Heart definition

A

a fist sized organ that pumps blood throughout your body

18
Q

Brain definition

A

the organ inside the head that controls all body functions of a human being

19
Q

Kidney definition

A

An organs that function is is primarily excretion of extra fluids as wastes

20
Q

Intestines definition

A

Long tube shaped organ in the abdomen that completes the process of digestion

21
Q

Stomach definition

A

An organ that is a part of the digestive system.

22
Q

Homeostasis definition

A

Balance or equilibrium

23
Q

Whats a positive feedback loop?

A

A change in a given direction causes additional change in the same direction

24
Q

Whats a negative feedback loop?

A

A change in a given direction that causes change in the opposite direction

25
Q

Active transport definition?

A

a kind of cellular transport where substances move against a concentration gradient.

26
Q

Passive transport definition?

A

the movement of ions and molecules across the cell membrane without requiring energy.

27
Q

Osmosis definition?

A

the net movement of water across a semipermeable membrane

28
Q

Diffusion definition

A

the movement of a substance from an area of high concentration to an area of lower concentration

28
Q

Diffusion definition

A

the movement of a substance from an area of high concentration to an area of lower concentration

28
Q

Diffusion definition

A

the movement of a substance from an area of high concentration to an area of lower concentration

29
Q

Why does a single celled organism function with only organelles but a multicellular organism needs tissues, organs, and organ systems to carry out life functions.

A

Single celled organisms contain every structure they need to survive within their one cell while

Mulicellular organisms need tissues to provide structural and strength

30
Q

What is a feedback loop?

A

the part of a system in which some portion (or all) of the system’s output is used as input for future operations.

31
Q

How can feedback loops help an organism maintain homeostasis?

A

Homeostasis of the body involves reaction times that must be met so that body functions can occur and keep the body healthy.

32
Q

Describe how the structure of the cell membrane facilitates is function

A

It forms a physical barrier and as a barrier between the cell and the external environment as it allows only selected necessary molecules to pass through it and at the same time prevents entry of unwanted / unnecessary substances. It also regulates the entry and exit of molecules into and out of the cell.

33
Q

Whats the difference between osmosis and diffusion?

A

In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.

34
Q

Explain different types of passive and active transport.

A

Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy

Biology Test 2/22 (1 decks)

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