Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

Penyenggaraan Dan Kesinambungan Hidup (English)

KUIZ INI MENGANDUNGI 10 SOALAN

The human skeleton is divided into two main parts. Which of the following bones belongs to the axial skeleton?

Radius

Scapula

Sternum

Femur

None

Which of the following is NOT part of the appendicular skeleton?

Pelvic Girdle

Clavicle

Vertebral Column

Humerus

None

What is the role of neurotransmitters such as acetylcholine and GABA?

To create a physical bridge for the impulse to cross the synapse.

To provide energy for the transmission of nerve impulses.

To form the myelin sheath around the axon.

To carry the chemical signal across the synapse to the next neuron.

None

Which type of neuron is responsible for transmitting nerve impulses from the central nervous system to an effector like a muscle or gland?

Afferent neuron

Sensory neuron

Interneuron

Efferent neuron

None

What is the main driving force behind the process of ultrafiltration in the glomerulus?

Osmotic pressure created by proteins in Bowman’s capsule.

High hydrostatic pressure due to the differing diameters of afferent and efferent arterioles.

The diffusion of water down its concentration gradient

Active transport of waste products into the nephron.

None

What is the primary function of the myelin sheath that surrounds some axons?

To provide structural support to the cell body.

To synthesize neurotransmitters for the neuron.

To receive chemical signals from other neurons

To act as an insulator and speed up impulse transmission.

None

The transmission of a nerve impulse across a synapse involves the conversion of signals. What is the correct sequence of this conversion?

Chemical signal to electrical signal to chemical signal

Chemical signal to mechanical signal to electrical signal

Electrical signal to chemical signal to electrical signal

Electrical signal to mechanical signal to electrical signal

None

Which of the following correctly describes a symptom and cause of osteoporosis?

Symptom: Inability of blood to clot; Cause: Lack of clotting factors.

Symptom: Progressive muscle weakening; Cause: A mutant gene on the X chromosome.

Symptom: Joint inflammation; Cause: Uric acid crystal buildup.

Symptom: Porous, brittle bones; Cause: Lack of calcium and Vitamin D.

None

In the mechanism of blood clotting, what is the immediate role of thrombokinase?

It converts prothrombin into thrombin in the presence of calcium ions.

It converts fibrinogen into a mesh of fibrin.

It directly forms a plug at the site of the wound.

It causes platelets to break down and release their contents

None

10.

The functional unit of the kidney responsible for forming urine is the nephron. Which part of the nephron is primarily responsible for the selective reabsorption of glucose and amino acids?

Collecting duct

Proximal convoluted tubule

Glomerulus

Loop of Henle

None

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