WORKSHEET 7.1 the Respiratory Structures and Breathing Mechanisms in Humans and Animals

7/14/2019 WORKSHEET 7.1 the Respiratory Structures and Breathing Mechanisms in Humans and Animals

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Name : _____________________________ Chapter 7 Respiration

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CHAPTER 7 : RESPIRATION

WORKSHEET 7.1 The Respiratory Structures and Breathing Mechanisms inHumans and Animals

1. Label the figure below

a. Gaseous exchange occurs over the whole plasma membrane of an Amoeba sp

the pathway of _________ diffusion

the pathway of __________________ being eliminated

i. The respiratory surface for Amoeba sp. is the entire _____________________

membrane.

ii. It has a _________________ surface area per unit volume of the body, therefore

____________ alone is sufficient to transport gases into and out of the body

b. The tracheal system of an insect

i. The respiratory system of insects is known as the ______________ system,

which is composed of air tubes called ________________.

ii. Air enters the tracheae through ________________ which have _____________.

iii. The trachea is reinforced with rings of ___________________ to prevent it from

_____________________.

iv. The trachea branches into _____________ which provide a large surface area

for the ________ of gases.

_________________________________________________________________________________________WAJA BIOLOGY 2009JPN PERAK

Score __ /__

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[ 7 marks ]

[ 12 marks ]

P:

Q:




__________________________________________________________________________________________

c. The respiratory structure of a frog

i.. Gaseous exchange in frogs occurs through the ____________ and

_____________.

ii. The skin is _________________ and highly ___________ to respiratory gases

with a lot of ______________ under it.

iii. The lungs consist of two air ___________ with thin, ___________ which are

covered by a network of capillaries ______________.

d. The respiratory structure and breathing mechanism of a fish

i. Fish have ______ pairs of gills.

ii Each gill is composed of ________ which have numerous thin –walled ________

that have a rich supply of ____________________.

_________________________________________________________________________________________WAJA BIOLOGY 2009JPN PERAK 7.1/2

[ 10 marks ]

[ 4 marks ]

P:

Q:




__________________________________________________________________________________________

2. a. Label the figure below :

b. Rearrange the sequence in the correct order using numbers

Inspiration / inhalation Number

Ribs move upwards and outwardsExternal intercostal muscles contract

Diaphragm contracts

Thoracic volume increases

Air moves into the lungs

Diaphragm flattens downwards

Internal intercostal muscles relax

Air pressure inside lungs decreases

c. The graph in Figure below shows the changes in lung air pressure during inhalationand exhalation.

Air pressure in the lungs (mm Hg)

765P Q

760

S

755Time/sec

RCircle the part which represents the time when the rib bone starts moving upwards.

ANSWERS

WORKSHEET 7.1 The Respiratory Structures and Breathing Mechanisms inHumans and Animals


P

S

R

Q

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[ 4 marks ]

[ 1 marks ]

[ 8 marks ]




__________________________________________________________________________________________

1. Label the figure below

a. Gaseous exchange occurs over the whole plasma membrane of an Amoeba sp

the pathway of oxygen diffusion

the pathway of carbon dioxide being eliminated

i. The respiratory surface for Amoeba sp. is the entire plasma membrane.ii. It has a large surface area per unit volume of the body, therefore diffusion alone

is sufficient to transport gases into and out of the body

b. The tracheal system of an insect

i. The respiratory system of insects is known as the tracheal system, which iscomposed of air tubes called tracheae.

ii. Air enters the tracheae through spiracles which have valves.iii. The trachea is reinforced with rings of chitin to prevent it from collapsing.iv. The tracheae branches into tracheoles which provide a large surface area for

the diffusion of gases.

c. The respiratory structure of a frog


P: cytoplasm

Q: nucleus

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spiracle

cell

trachea

tracheole




__________________________________________________________________________________________

i. Gaseous exchange in frogs occurs through the skin and lungs.ii. The skin is thin and highly permeable to respiratory gases with a lot of blood

capillaries under it.iii. The lungs consist of two air sacs with thin, moist membrane which are covered

by a network of capillaries.

d. The respiratory structure and breathing mechanism of fish

i. Fish have four pairs of gills.ii. Each gill is composed of filaments which have numerous thin –walled lamellae

that have a rich supply of blood capillaries.

2. a. Label the figure below

b. Rearrange the sequence in the correct order using numbers


P trachea

S alveolus

R diaphragm

Q rib

P: lung

Q: nostril

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__________________________________________________________________________________________

Inspiration / inhalation Number

Ribs move upwards and outwards 3

External intercostal muscles contract 1

Diaphragm contracts 4

Thoracic volume increases 6 Air moves into the lungs 8

Diaphragm flattens downwards 5

Internal intercostal muscles relax 2

Air pressure inside lungs decreases 7

c. The graph in Figure below shows the changes in lung air pressure during

inhalation and exhalation.

Air pressure in the lungs (mm Hg)

765P Q

760

S

755Time/sec

RCircle the part which represents the time when the rib bone starts moving upwards?


7.1/6

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WORKSHEET 7.1 the Respiratory Structures and Breathing Mechanisms in Humans and Animals