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Biology > Multicellular Organisms pt2 > Flashcards

Multicellular Organisms pt2 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Sensory neurons

A

Carry electrical impulses from sense organs (receptors) to the CNS

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2
Q

Inter neurons

A

Carry impulses from sensory neurons to motor neurons

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3
Q

Motor neurons

A

Carry eletrical impulses from CNS to mucle or glands (effector)

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4
Q

Synapse

A

Occurs between neurons

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5
Q

What carries the messages sent by eletrical impulses between the neurons and the synapses

A

Chemicals

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6
Q

What is the endocrine system

A

It influences almost every cell and organ in the body.controls process that happen slowly

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7
Q

The main part of the endocrine system are

A

Glands, organs and hormones

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8
Q

Glands release what into the blood stream

A

Hormones

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9
Q

Hormones are…

A

Chemical messengers in the blood e.g ADH

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10
Q

Target tissues have….

A

Receptors for the hormones so only specific tissues are effected by specific hormones

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11
Q

Glucose is…

A

A sugar released during the break down of carbohydrates that provides the body with energy

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12
Q

How can glucose be stored

A

As fat or glycogen in the liver

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13
Q

The level of glucose in the blood is controlled by…

A

Hormones

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14
Q

If a rise of blood sugar is detected

A

The pancreas sends insulin in the blood to convert the glucose into glycogen

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15
Q

If blood sugar drops…

A

The pancreas produces glucagon that breaks down glycogen into glucose

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16
Q

Gametes are…

A

Specialised cells

17
Q

Gametes contains….

A

Half the genetic information of a normal body cell

18
Q

Cells that contain only half of the genetic information are called..

A

Haploids

19
Q

Normal cells are referred to as

A

Diploid

20
Q

Cells need to be replaced when…

A

They become too old to function

21
Q

Cells are replaced by…

A

Existing cells dividing

22
Q

Mitosis is…

A

The division of the nucleus

23
Q

At stage one of mitosis…

A

The DNA is uncoiled

24
Q

At stage two of mitosis…

A

Chromatids apear

25
Q

At stage three of mitosis…

A

Chromosomes line up at the equator

26
Q

At stage four of mitosis…

A

Spindle fibers pull the chromatids apart

27
Q

At stage five of mitosis…

A

The cytoplasm splits and the nucleus reforms

28
Q

At stage six of mitosis…

A

Two daughter cells are formed

29
Q

Chromosomes contain ….

A

All the genetic information required for the development of the cell

30
Q

The chromosome compliment is…

A

The number of chromosomes in a species nucli

31
Q

Diploid cells…

A

Have sets of chromosomes eg humans have 23 pairs of chromosomes or 46 individual chromosomes

32
Q

Stem cells are…

A

Unspecified cells found in all animals

33
Q

Glucose is…

A

A sugar released during the breakdown of carbohydrates to provide the body with energy

34
Q

What regulates the levels of glucose in the blood?

A

Hormones (glucagon and insulin)

35
Q

If the pancreas detects a rise in blood sugar it…..

A

Produces insulin

36
Q

Insulin converts glucose to…

A

Glycogen for storage

37
Q

If the pancreas detects a drop in blood sugar it produces….

A

Glucagon which breaks glycogen into glucose

Biology (15 decks)

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